EN 50010 : low voltage switchgear and controlgear for industrial use. Inductive proximity switches. Methods for measuring the operating distance and operating frequency / European Commitee for electrothecnical Standardization
Signalling on low-voltage electrical installations in the frequency range 3khz to 148,5 khz : part 1: general requirements, frequency bands and electromagnetic disturbances: EN 50065 -1: 1991 / European Commitee for Electrothecnical Standardization
EN 50065 -1/A1 : amendment A2: signalling on low-voltage electrical installations in the frequency range 3khz to 148,5 khz: part 1: general requirements, frequency bands and electromagnetic disturbances / European Commitee for Electrothecnical Standardization
EN 50065 -1/A3 : 1996: signalling on low-voltage electrical installations in the frequency range 3khz to 148,5 khz: part 1: general requirements, frequency bands and electromagnetic disturbances: amendment A3 / European Commitee for Electrothecnical Standardization